The #1 thing that teen males lie or exaggerate is the number of sexual partners they have had. If they say it enough, they almost believe their own tales.
The #1 thing that adults (male or female) lie or exaggerate is the number of hours they work per week. Unlike the teen, though they don't just "almost" believe it but they actually believe their own tales.
Here how it works:
1. Guy works a 2-week stretch where his hours are 80 per week. Then he goes back to the normal 55. Does he say he averages 60? No, the high week of 80 is what he says is his new "average".
2. Girl gets an email on a weekend morning at 9am and has to do some research on it. In the middle, at 11am she goes to the mall, has lunch with a friend, runs some errands. She gets back at 5pm and returns to her work assignment. Doesn't finish till 7pm. Ah, 10-hours of work put in on a Saturday!